/* Doc 133: the download page. Colours and surfaces from the app (styles.css, look.css). */

:root {
  --bg: #14161a;
  --bg-raised: #1c1f26;
  --border: #2b303a;
  --text: #e7e9ee;
  --text-dim: #b3bac6;
  --accent: #4ade80;
  --accent-ink: #0b1f12;
  --surface: color-mix(in srgb, var(--bg-raised) 80%, transparent);
  --font: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  --mono: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.55;
}

a {
  color: var(--accent);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* --- the moving background ------------------------------------------------------- */

.bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  background: var(--bg) url('media/particles-poster.jpg') center / cover no-repeat;
}

.bg__video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.bg__scrim {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgb(10 11 14 / 0.55), rgb(10 11 14 / 0.7));
}

@media (prefers-reduced-motion: reduce) {
  .bg__video {
    display: none;
  }
}

/* --- layout ---------------------------------------------------------------------- */

.top,
main,
.foot {
  position: relative;
  z-index: 1;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 20px;
}

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 20px;
}

.top__name {
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
}

.top__links {
  display: flex;
  align-items: center;
  gap: 16px;
}

.lang {
  font: inherit;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 10px;
  cursor: pointer;
}

.hero {
  padding: 72px 0 40px;
  max-width: 760px;
}

.hero h1 {
  font-size: clamp(2rem, 4.5vw, 3.1rem);
  line-height: 1.15;
  margin: 0 0 18px;
}

.hero__lead {
  font-size: 1.15rem;
  color: var(--text-dim);
  margin: 0 0 18px;
}

.hero__version {
  display: inline-block;
  margin: 0;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: 0.95rem;
}

/* --- download cards -------------------------------------------------------------- */

.downloads {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 18px;
}

.card,
.fact {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px;
  backdrop-filter: blur(6px);
}

.card h3 {
  margin: 0;
  font-size: 1.4rem;
}

.card__meta {
  margin: 2px 0 16px;
  color: var(--text-dim);
}

.card__step {
  margin: 14px 0 6px;
}

.card__note {
  margin: 14px 0 0;
  font-size: 0.92rem;
  color: var(--text-dim);
}

.btn {
  display: inline-block;
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  border-radius: 8px;
  padding: 10px 18px;
}

.btn--primary {
  background: var(--accent);
  color: var(--accent-ink);
}

.btn--primary:hover {
  filter: brightness(1.08);
}

.cmd {
  display: flex;
  align-items: stretch;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  background: rgb(0 0 0 / 0.35);
}

.cmd code {
  flex: 1;
  min-width: 0;
  padding: 10px 12px;
  font-family: var(--mono);
  font-size: 0.82rem;
  /* The whole command visible, broken anywhere: it is copied, not read word by word. */
  white-space: pre-wrap;
  word-break: break-all;
}

.cmd__copy {
  font: inherit;
  font-size: 0.9rem;
  border: 0;
  border-left: 1px solid var(--border);
  background: var(--bg-raised);
  color: var(--text);
  padding: 0 14px;
  cursor: pointer;
}

/* --- facts and footer ------------------------------------------------------------ */

.facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
  margin-top: 36px;
}

.fact h3 {
  margin: 0 0 6px;
  font-size: 1.1rem;
}

.fact p {
  margin: 0;
  color: var(--text-dim);
}

.more {
  margin: 34px 0 0;
  text-align: center;
}

.foot {
  padding-top: 40px;
  padding-bottom: 28px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-dim);
}

@media (max-width: 560px) {
  .hero {
    padding-top: 40px;
  }
}